Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1 | // Copyright 2011 Google Inc. All Rights Reserved. |
| 2 | // Author: cshapiro@google.com (Carl Shapiro) |
| 3 | |
| 4 | #include "src/class_linker.h" |
| 5 | |
| 6 | #include <vector> |
| 7 | #include <utility> |
| 8 | |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 9 | #include "src/casts.h" |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 10 | #include "src/dex_verifier.h" |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 11 | #include "src/heap.h" |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 12 | #include "src/logging.h" |
| 13 | #include "src/monitor.h" |
| 14 | #include "src/object.h" |
| 15 | #include "src/raw_dex_file.h" |
| 16 | #include "src/scoped_ptr.h" |
| 17 | #include "src/thread.h" |
| 18 | #include "src/utils.h" |
| 19 | |
| 20 | namespace art { |
| 21 | |
Carl Shapiro | 61e019d | 2011-07-14 16:53:09 -0700 | [diff] [blame] | 22 | ClassLinker* ClassLinker::Create() { |
| 23 | scoped_ptr<ClassLinker> class_linker(new ClassLinker); |
| 24 | class_linker->Init(); |
| 25 | // TODO: check for failure during initialization |
| 26 | return class_linker.release(); |
| 27 | } |
| 28 | |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 29 | void ClassLinker::Init() { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 30 | // Allocate and partially initialize the Class, Object, Field, Method classes. |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 31 | // Initialization will be completed when the definitions are loaded. |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 32 | java_lang_Class_ = reinterpret_cast<Class*>(Heap::AllocRaw(sizeof(Class), NULL)); |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 33 | java_lang_Class_->descriptor_ = "Ljava/lang/Class;"; |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 34 | java_lang_Class_->object_size_ = sizeof(Class); |
| 35 | java_lang_Class_->klass_ = java_lang_Class_; |
| 36 | |
| 37 | java_lang_Object_ = AllocClass(NULL); |
| 38 | java_lang_Object_->descriptor_ = "Ljava/lang/Object;"; |
| 39 | |
| 40 | java_lang_Class_->super_class_ = java_lang_Object_; |
| 41 | |
| 42 | java_lang_ref_Field_ = AllocClass(NULL); |
| 43 | java_lang_ref_Field_->descriptor_ = "Ljava/lang/ref/Field;"; |
| 44 | |
| 45 | java_lang_ref_Method_ = AllocClass(NULL); |
| 46 | java_lang_ref_Method_->descriptor_ = "Ljava/lang/Method;"; |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 47 | |
| 48 | // Allocate and initialize the primitive type classes. |
| 49 | primitive_byte_ = CreatePrimitiveClass(kTypeByte, "B"); |
| 50 | primitive_char_ = CreatePrimitiveClass(kTypeChar, "C"); |
| 51 | primitive_double_ = CreatePrimitiveClass(kTypeDouble, "D"); |
| 52 | primitive_float_ = CreatePrimitiveClass(kTypeFloat, "F"); |
| 53 | primitive_int_ = CreatePrimitiveClass(kTypeInt, "I"); |
| 54 | primitive_long_ = CreatePrimitiveClass(kTypeLong, "J"); |
| 55 | primitive_short_ = CreatePrimitiveClass(kTypeShort, "S"); |
| 56 | primitive_boolean_ = CreatePrimitiveClass(kTypeBoolean, "Z"); |
| 57 | primitive_void_ = CreatePrimitiveClass(kTypeVoid, "V"); |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 58 | |
| 59 | char_array_class_ = AllocClass(NULL); |
| 60 | char_array_class_->descriptor_ = "[C"; |
| 61 | char_array_class_->status_ = Class::kStatusInitialized; |
| 62 | char_array_class_->component_type_ = primitive_char_; |
| 63 | char_array_class_->array_rank_ = 1; |
| 64 | char_array_class_->primitive_type_ = Class::kPrimNot; |
| 65 | char_array_class_->super_class_ = java_lang_Object_; |
| 66 | } |
| 67 | |
| 68 | Class* ClassLinker::AllocClass(DexFile* dex_file) { |
| 69 | Class* klass = reinterpret_cast<Class*>(Heap::AllocObject(java_lang_Class_)); |
| 70 | klass->dex_file_ = dex_file; |
| 71 | return klass; |
| 72 | } |
| 73 | |
| 74 | StaticField* ClassLinker::AllocStaticField() { |
| 75 | return reinterpret_cast<StaticField*>(Heap::AllocRaw(sizeof(StaticField), java_lang_ref_Field_)); |
| 76 | } |
| 77 | |
| 78 | InstanceField* ClassLinker::AllocInstanceField() { |
| 79 | return reinterpret_cast<InstanceField*>(Heap::AllocRaw(sizeof(InstanceField), java_lang_ref_Field_)); |
| 80 | } |
| 81 | |
| 82 | Method* ClassLinker::AllocMethod() { |
| 83 | return reinterpret_cast<Method*>(Heap::AllocRaw(sizeof(Method), java_lang_ref_Method_)); |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 84 | } |
| 85 | |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 86 | Class* ClassLinker::FindClass(const StringPiece& descriptor, |
| 87 | Object* class_loader) { |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 88 | Thread* self = Thread::Current(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 89 | CHECK(!self->IsExceptionPending()); |
| 90 | // Find the class in the loaded classes table. |
| 91 | Class* klass = LookupClass(descriptor, class_loader); |
| 92 | if (klass == NULL) { |
| 93 | // Class is not yet loaded. |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 94 | const RawDexFile::ClassDef* class_def; |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 95 | // No .dex file specified, search the class path. |
| 96 | ClassPathEntry pair = FindInClassPath(descriptor); |
| 97 | if (pair.first == NULL) { |
| 98 | LG << "Class " << descriptor << " really not found"; |
| 99 | return NULL; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 100 | } |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 101 | DexFile* dex_file = pair.first; |
| 102 | class_def = pair.second; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 103 | // Load the class from the dex file. |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 104 | if (descriptor == "Ljava/lang/Object;") { |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 105 | klass = java_lang_Object_; |
| 106 | klass->dex_file_ = dex_file; |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 107 | klass->object_size_ = sizeof(Object); |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 108 | char_array_class_->super_class_idx_ = class_def->class_idx_; |
| 109 | } else if (descriptor == "Ljava/lang/Class;") { |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 110 | klass = java_lang_Class_; |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 111 | klass->dex_file_ = dex_file; |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 112 | klass->object_size_ = sizeof(Class); |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 113 | } else if (descriptor == "Ljava/lang/ref/Field;") { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 114 | klass = java_lang_ref_Field_; |
| 115 | klass->dex_file_ = dex_file; |
| 116 | klass->object_size_ = sizeof(Field); |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 117 | } else if (descriptor == "Ljava/lang/ref/Method;") { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 118 | klass = java_lang_ref_Method_; |
| 119 | klass->dex_file_ = dex_file; |
| 120 | klass->object_size_ = sizeof(Method); |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 121 | } else if (descriptor == "Ljava/lang/String;") { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 122 | klass = java_lang_String_; |
| 123 | klass->dex_file_ = dex_file; |
| 124 | klass->object_size_ = sizeof(String); |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 125 | } else { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 126 | klass = AllocClass(dex_file); |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 127 | } |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 128 | bool is_loaded = LoadClass(*class_def, klass); |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 129 | if (!is_loaded) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 130 | // TODO: this occurs only when a dex file is provided. |
| 131 | LG << "Class not found"; // TODO: NoClassDefFoundError |
| 132 | return NULL; |
| 133 | } |
| 134 | // Check for a pending exception during load |
| 135 | if (self->IsExceptionPending()) { |
| 136 | // TODO: free native allocations in klass |
| 137 | return NULL; |
| 138 | } |
| 139 | { |
| 140 | ObjectLock lock(klass); |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 141 | klass->clinit_thread_id_ = self->GetId(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 142 | // Add the newly loaded class to the loaded classes table. |
| 143 | bool success = InsertClass(klass); |
| 144 | if (!success) { |
| 145 | // We may fail to insert if we raced with another thread. |
| 146 | klass->clinit_thread_id_ = 0; |
| 147 | // TODO: free native allocations in klass |
| 148 | klass = LookupClass(descriptor, class_loader); |
| 149 | CHECK(klass != NULL); |
| 150 | } else { |
| 151 | // Link the class. |
| 152 | if (!LinkClass(klass)) { |
| 153 | // Linking failed. |
| 154 | // TODO: CHECK(self->IsExceptionPending()); |
| 155 | lock.NotifyAll(); |
| 156 | return NULL; |
| 157 | } |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | // Link the class if it has not already been linked. |
| 162 | if (!klass->IsLinked() && !klass->IsErroneous()) { |
| 163 | ObjectLock lock(klass); |
| 164 | // Check for circular dependencies between classes. |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 165 | if (!klass->IsLinked() && klass->clinit_thread_id_ == self->GetId()) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 166 | LG << "Recursive link"; // TODO: ClassCircularityError |
| 167 | return NULL; |
| 168 | } |
| 169 | // Wait for the pending initialization to complete. |
| 170 | while (!klass->IsLinked() && !klass->IsErroneous()) { |
| 171 | lock.Wait(); |
| 172 | } |
| 173 | } |
| 174 | if (klass->IsErroneous()) { |
| 175 | LG << "EarlierClassFailure"; // TODO: EarlierClassFailure |
| 176 | return NULL; |
| 177 | } |
| 178 | // Return the loaded class. No exceptions should be pending. |
| 179 | CHECK(!self->IsExceptionPending()); |
| 180 | return klass; |
| 181 | } |
| 182 | |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 183 | bool ClassLinker::LoadClass(const StringPiece& descriptor, Class* klass) { |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 184 | const RawDexFile* raw = klass->GetDexFile()->GetRaw(); |
| 185 | const RawDexFile::ClassDef* class_def = raw->FindClassDef(descriptor); |
| 186 | if (class_def == NULL) { |
| 187 | return false; |
| 188 | } else { |
| 189 | return LoadClass(*class_def, klass); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | bool ClassLinker::LoadClass(const RawDexFile::ClassDef& class_def, Class* klass) { |
| 194 | CHECK(klass != NULL); |
| 195 | CHECK(klass->dex_file_ != NULL); |
| 196 | const RawDexFile* raw = klass->GetDexFile()->GetRaw(); |
| 197 | const byte* class_data = raw->GetClassData(class_def); |
| 198 | RawDexFile::ClassDataHeader header = raw->ReadClassDataHeader(&class_data); |
| 199 | |
| 200 | const char* descriptor = raw->GetClassDescriptor(class_def); |
| 201 | CHECK(descriptor != NULL); |
| 202 | |
| 203 | klass->klass_ = java_lang_Class_; |
| 204 | klass->descriptor_.set(descriptor); |
| 205 | klass->descriptor_alloc_ = NULL; |
| 206 | klass->access_flags_ = class_def.access_flags_; |
| 207 | klass->class_loader_ = NULL; // TODO |
| 208 | klass->primitive_type_ = Class::kPrimNot; |
| 209 | klass->status_ = Class::kStatusIdx; |
| 210 | |
| 211 | klass->super_class_ = NULL; |
| 212 | klass->super_class_idx_ = class_def.superclass_idx_; |
| 213 | |
| 214 | klass->num_sfields_ = header.static_fields_size_; |
| 215 | klass->num_ifields_ = header.instance_fields_size_; |
| 216 | klass->num_direct_methods_ = header.direct_methods_size_; |
| 217 | klass->num_virtual_methods_ = header.virtual_methods_size_; |
| 218 | |
| 219 | klass->source_file_ = raw->dexGetSourceFile(class_def); |
| 220 | |
| 221 | // Load class interfaces. |
| 222 | LoadInterfaces(class_def, klass); |
| 223 | |
| 224 | // Load static fields. |
| 225 | if (klass->num_sfields_ != 0) { |
| 226 | // TODO: allocate on the object heap. |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 227 | klass->sfields_ = new StaticField*[klass->NumStaticFields()](); |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 228 | uint32_t last_idx = 0; |
| 229 | for (size_t i = 0; i < klass->num_sfields_; ++i) { |
| 230 | RawDexFile::Field raw_field; |
| 231 | raw->dexReadClassDataField(&class_data, &raw_field, &last_idx); |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 232 | StaticField* sfield = AllocStaticField(); |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 233 | klass->sfields_[i] = sfield; |
| 234 | LoadField(klass, raw_field, sfield); |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 235 | } |
| 236 | } |
| 237 | |
| 238 | // Load instance fields. |
| 239 | if (klass->NumInstanceFields() != 0) { |
| 240 | // TODO: allocate on the object heap. |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 241 | klass->ifields_ = new InstanceField*[klass->NumInstanceFields()](); |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 242 | uint32_t last_idx = 0; |
| 243 | for (size_t i = 0; i < klass->NumInstanceFields(); ++i) { |
| 244 | RawDexFile::Field raw_field; |
| 245 | raw->dexReadClassDataField(&class_data, &raw_field, &last_idx); |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 246 | InstanceField* ifield = AllocInstanceField(); |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 247 | klass->ifields_[i] = ifield; |
| 248 | LoadField(klass, raw_field, ifield); |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 249 | } |
| 250 | } |
| 251 | |
| 252 | // Load direct methods. |
| 253 | if (klass->NumDirectMethods() != 0) { |
| 254 | // TODO: append direct methods to class object |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 255 | klass->direct_methods_ = new Method*[klass->NumDirectMethods()](); |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 256 | uint32_t last_idx = 0; |
| 257 | for (size_t i = 0; i < klass->NumDirectMethods(); ++i) { |
| 258 | RawDexFile::Method raw_method; |
| 259 | raw->dexReadClassDataMethod(&class_data, &raw_method, &last_idx); |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 260 | Method* meth = AllocMethod(); |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 261 | klass->direct_methods_[i] = meth; |
| 262 | LoadMethod(klass, raw_method, meth); |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 263 | // TODO: register maps |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | // Load virtual methods. |
| 268 | if (klass->NumVirtualMethods() != 0) { |
| 269 | // TODO: append virtual methods to class object |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 270 | klass->virtual_methods_ = new Method*[klass->NumVirtualMethods()](); |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 271 | uint32_t last_idx = 0; |
| 272 | for (size_t i = 0; i < klass->NumVirtualMethods(); ++i) { |
| 273 | RawDexFile::Method raw_method; |
| 274 | raw->dexReadClassDataMethod(&class_data, &raw_method, &last_idx); |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 275 | Method* meth = AllocMethod(); |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 276 | klass->virtual_methods_[i] = meth; |
| 277 | LoadMethod(klass, raw_method, meth); |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 278 | // TODO: register maps |
| 279 | } |
| 280 | } |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 281 | return true; |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | void ClassLinker::LoadInterfaces(const RawDexFile::ClassDef& class_def, |
| 285 | Class* klass) { |
| 286 | const RawDexFile* raw = klass->GetDexFile()->GetRaw(); |
| 287 | const RawDexFile::TypeList* list = raw->GetInterfacesList(class_def); |
| 288 | if (list != NULL) { |
| 289 | klass->interface_count_ = list->Size(); |
| 290 | // TODO: allocate the interfaces array on the object heap. |
| 291 | klass->interfaces_ = new Class*[list->Size()](); |
| 292 | for (size_t i = 0; i < list->Size(); ++i) { |
| 293 | const RawDexFile::TypeItem& type_item = list->GetTypeItem(i); |
| 294 | klass->interfaces_[i] = reinterpret_cast<Class*>(type_item.type_idx_); |
| 295 | } |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | void ClassLinker::LoadField(Class* klass, const RawDexFile::Field& src, |
| 300 | Field* dst) { |
| 301 | const RawDexFile* raw = klass->GetDexFile()->GetRaw(); |
| 302 | const RawDexFile::FieldId& field_id = raw->GetFieldId(src.field_idx_); |
| 303 | dst->klass_ = klass; |
| 304 | dst->name_ = raw->dexStringById(field_id.name_idx_); |
| 305 | dst->signature_ = raw->dexStringByTypeIdx(field_id.type_idx_); |
| 306 | dst->access_flags_ = src.access_flags_; |
| 307 | } |
| 308 | |
| 309 | void ClassLinker::LoadMethod(Class* klass, const RawDexFile::Method& src, |
| 310 | Method* dst) { |
| 311 | const RawDexFile* raw = klass->GetDexFile()->GetRaw(); |
| 312 | const RawDexFile::MethodId& method_id = raw->GetMethodId(src.method_idx_); |
| 313 | dst->klass_ = klass; |
| 314 | dst->name_.set(raw->dexStringById(method_id.name_idx_)); |
| 315 | dst->proto_idx_ = method_id.proto_idx_; |
| 316 | dst->shorty_.set(raw->GetShorty(method_id.proto_idx_)); |
| 317 | dst->access_flags_ = src.access_flags_; |
| 318 | |
| 319 | // TODO: check for finalize method |
| 320 | |
| 321 | const RawDexFile::CodeItem* code_item = raw->GetCodeItem(src); |
| 322 | if (code_item != NULL) { |
| 323 | dst->num_registers_ = code_item->registers_size_; |
| 324 | dst->num_ins_ = code_item->ins_size_; |
| 325 | dst->num_outs_ = code_item->outs_size_; |
| 326 | dst->insns_ = code_item->insns_; |
| 327 | } else { |
| 328 | uint16_t num_args = dst->NumArgRegisters(); |
| 329 | if (!dst->IsStatic()) { |
| 330 | ++num_args; |
| 331 | } |
| 332 | dst->num_registers_ = dst->num_ins_ + num_args; |
| 333 | // TODO: native methods |
| 334 | } |
| 335 | } |
| 336 | |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 337 | ClassLinker::ClassPathEntry ClassLinker::FindInClassPath(const StringPiece& descriptor) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 338 | for (size_t i = 0; i != class_path_.size(); ++i) { |
| 339 | DexFile* dex_file = class_path_[i]; |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 340 | const RawDexFile::ClassDef* class_def = dex_file->GetRaw()->FindClassDef(descriptor); |
| 341 | if (class_def != NULL) { |
| 342 | return ClassPathEntry(dex_file, class_def); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 343 | } |
| 344 | } |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 345 | return ClassPathEntry(NULL, NULL); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | void ClassLinker::AppendToClassPath(DexFile* dex_file) { |
| 349 | class_path_.push_back(dex_file); |
| 350 | } |
| 351 | |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 352 | Class* ClassLinker::CreatePrimitiveClass(JType type, const char* descriptor) { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 353 | Class* klass = AllocClass(NULL); |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 354 | CHECK(klass != NULL); |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 355 | klass->super_class_ = NULL; |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 356 | klass->access_flags_ = kAccPublic | kAccFinal | kAccAbstract; |
| 357 | klass->descriptor_ = descriptor; |
| 358 | klass->status_ = Class::kStatusInitialized; |
| 359 | return klass; |
| 360 | } |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 361 | |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 362 | Class* ClassLinker::FindPrimitiveClass(JType type) { |
| 363 | switch (type) { |
| 364 | case kTypeByte: |
| 365 | CHECK(primitive_byte_ != NULL); |
| 366 | return primitive_byte_; |
| 367 | case kTypeChar: |
| 368 | CHECK(primitive_char_ != NULL); |
| 369 | return primitive_char_; |
| 370 | case kTypeDouble: |
| 371 | CHECK(primitive_double_ != NULL); |
| 372 | return primitive_double_; |
| 373 | case kTypeFloat: |
| 374 | CHECK(primitive_float_ != NULL); |
| 375 | return primitive_float_; |
| 376 | case kTypeInt: |
| 377 | CHECK(primitive_int_ != NULL); |
| 378 | return primitive_int_; |
| 379 | case kTypeLong: |
| 380 | CHECK(primitive_long_ != NULL); |
| 381 | return primitive_long_; |
| 382 | case kTypeShort: |
| 383 | CHECK(primitive_short_ != NULL); |
| 384 | return primitive_short_; |
| 385 | case kTypeBoolean: |
| 386 | CHECK(primitive_boolean_ != NULL); |
| 387 | return primitive_boolean_; |
| 388 | case kTypeVoid: |
| 389 | CHECK(primitive_void_ != NULL); |
| 390 | return primitive_void_; |
| 391 | default: |
| 392 | LOG(FATAL) << "Unknown primitive type " << static_cast<int>(type); |
| 393 | }; |
| 394 | return NULL; // Not reachable. |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 395 | } |
| 396 | |
| 397 | bool ClassLinker::InsertClass(Class* klass) { |
| 398 | // TODO: acquire classes_lock_ |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 399 | const StringPiece& key = klass->GetDescriptor(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 400 | bool success = classes_.insert(std::make_pair(key, klass)).second; |
| 401 | // TODO: release classes_lock_ |
| 402 | return success; |
| 403 | } |
| 404 | |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 405 | Class* ClassLinker::LookupClass(const StringPiece& descriptor, Object* class_loader) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 406 | // TODO: acquire classes_lock_ |
| 407 | Table::iterator it = classes_.find(descriptor); |
| 408 | // TODO: release classes_lock_ |
| 409 | if (it == classes_.end()) { |
| 410 | return NULL; |
| 411 | } else { |
| 412 | return (*it).second; |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | bool ClassLinker::InitializeClass(Class* klass) { |
| 417 | CHECK(klass->GetStatus() == Class::kStatusResolved || |
| 418 | klass->GetStatus() == Class::kStatusError); |
| 419 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 420 | Thread* self = Thread::Current(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 421 | |
| 422 | { |
| 423 | ObjectLock lock(klass); |
| 424 | |
| 425 | if (klass->GetStatus() < Class::kStatusVerified) { |
| 426 | if (klass->IsErroneous()) { |
| 427 | LG << "re-initializing failed class"; // TODO: throw |
| 428 | return false; |
| 429 | } |
| 430 | |
| 431 | CHECK(klass->GetStatus() == Class::kStatusResolved); |
| 432 | |
| 433 | klass->status_ = Class::kStatusVerifying; |
| 434 | if (!DexVerify::VerifyClass(klass)) { |
| 435 | LG << "Verification failed"; // TODO: ThrowVerifyError |
| 436 | Object* exception = self->GetException(); |
| 437 | klass->SetObjectAt(OFFSETOF_MEMBER(Class, verify_error_class_), |
| 438 | exception->GetClass()); |
| 439 | klass->SetStatus(Class::kStatusError); |
| 440 | return false; |
| 441 | } |
| 442 | |
| 443 | klass->SetStatus(Class::kStatusVerified); |
| 444 | } |
| 445 | |
| 446 | if (klass->status_ == Class::kStatusInitialized) { |
| 447 | return true; |
| 448 | } |
| 449 | |
| 450 | while (klass->status_ == Class::kStatusInitializing) { |
| 451 | // we caught somebody else in the act; was it us? |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 452 | if (klass->clinit_thread_id_ == self->GetId()) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 453 | LG << "recursive <clinit>"; |
| 454 | return true; |
| 455 | } |
| 456 | |
| 457 | CHECK(!self->IsExceptionPending()); |
| 458 | |
| 459 | lock.Wait(); // TODO: check for interruption |
| 460 | |
| 461 | // When we wake up, repeat the test for init-in-progress. If |
| 462 | // there's an exception pending (only possible if |
| 463 | // "interruptShouldThrow" was set), bail out. |
| 464 | if (self->IsExceptionPending()) { |
| 465 | CHECK(false); |
| 466 | LG << "Exception in initialization."; // TODO: ExceptionInInitializerError |
| 467 | klass->SetStatus(Class::kStatusError); |
| 468 | return false; |
| 469 | } |
| 470 | if (klass->GetStatus() == Class::kStatusInitializing) { |
| 471 | continue; |
| 472 | } |
| 473 | assert(klass->GetStatus() == Class::kStatusInitialized || |
| 474 | klass->GetStatus() == Class::kStatusError); |
| 475 | if (klass->IsErroneous()) { |
| 476 | /* |
| 477 | * The caller wants an exception, but it was thrown in a |
| 478 | * different thread. Synthesize one here. |
| 479 | */ |
| 480 | LG << "<clinit> failed"; // TODO: throw UnsatisfiedLinkError |
| 481 | return false; |
| 482 | } |
| 483 | return true; // otherwise, initialized |
| 484 | } |
| 485 | |
| 486 | // see if we failed previously |
| 487 | if (klass->IsErroneous()) { |
| 488 | // might be wise to unlock before throwing; depends on which class |
| 489 | // it is that we have locked |
| 490 | |
| 491 | // TODO: throwEarlierClassFailure(klass); |
| 492 | return false; |
| 493 | } |
| 494 | |
| 495 | if (!ValidateSuperClassDescriptors(klass)) { |
| 496 | klass->SetStatus(Class::kStatusError); |
| 497 | return false; |
| 498 | } |
| 499 | |
| 500 | assert(klass->status < CLASS_INITIALIZING); |
| 501 | |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 502 | klass->clinit_thread_id_ = self->GetId(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 503 | klass->status_ = Class::kStatusInitializing; |
| 504 | } |
| 505 | |
| 506 | if (!InitializeSuperClass(klass)) { |
| 507 | return false; |
| 508 | } |
| 509 | |
| 510 | InitializeStaticFields(klass); |
| 511 | |
| 512 | Method* clinit = klass->FindDirectMethodLocally("<clinit>", "()V"); |
| 513 | if (clinit != NULL) { |
| 514 | } else { |
| 515 | // JValue unused; |
| 516 | // TODO: dvmCallMethod(self, method, NULL, &unused); |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 517 | //CHECK(!"unimplemented"); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 518 | } |
| 519 | |
| 520 | { |
| 521 | ObjectLock lock(klass); |
| 522 | |
| 523 | if (self->IsExceptionPending()) { |
| 524 | klass->SetStatus(Class::kStatusError); |
| 525 | } else { |
| 526 | klass->SetStatus(Class::kStatusInitialized); |
| 527 | } |
| 528 | lock.NotifyAll(); |
| 529 | } |
| 530 | |
| 531 | return true; |
| 532 | } |
| 533 | |
| 534 | bool ClassLinker::ValidateSuperClassDescriptors(const Class* klass) { |
| 535 | if (klass->IsInterface()) { |
| 536 | return true; |
| 537 | } |
| 538 | // begin with the methods local to the superclass |
| 539 | if (klass->HasSuperClass() && |
| 540 | klass->GetClassLoader() != klass->GetSuperClass()->GetClassLoader()) { |
| 541 | const Class* super = klass->GetSuperClass(); |
| 542 | for (int i = super->NumVirtualMethods() - 1; i >= 0; --i) { |
| 543 | const Method* method = klass->GetVirtualMethod(i); |
| 544 | if (method != super->GetVirtualMethod(i) && |
| 545 | !HasSameMethodDescriptorClasses(method, super, klass)) { |
| 546 | LG << "Classes resolve differently in superclass"; |
| 547 | return false; |
| 548 | } |
| 549 | } |
| 550 | } |
| 551 | for (size_t i = 0; i < klass->iftable_count_; ++i) { |
| 552 | const InterfaceEntry* iftable = &klass->iftable_[i]; |
| 553 | Class* interface = iftable->GetClass(); |
| 554 | if (klass->GetClassLoader() != interface->GetClassLoader()) { |
| 555 | for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) { |
| 556 | uint32_t vtable_index = iftable->method_index_array_[j]; |
| 557 | const Method* method = klass->GetVirtualMethod(vtable_index); |
| 558 | if (!HasSameMethodDescriptorClasses(method, interface, |
| 559 | method->GetClass())) { |
| 560 | LG << "Classes resolve differently in interface"; // TODO: LinkageError |
| 561 | return false; |
| 562 | } |
| 563 | } |
| 564 | } |
| 565 | } |
| 566 | return true; |
| 567 | } |
| 568 | |
| 569 | bool ClassLinker::HasSameMethodDescriptorClasses(const Method* method, |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 570 | const Class* klass1, |
| 571 | const Class* klass2) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 572 | const RawDexFile* raw = method->GetClass()->GetDexFile()->GetRaw(); |
| 573 | const RawDexFile::ProtoId& proto_id = raw->GetProtoId(method->proto_idx_); |
| 574 | RawDexFile::ParameterIterator *it; |
| 575 | for (it = raw->GetParameterIterator(proto_id); it->HasNext(); it->Next()) { |
| 576 | const char* descriptor = it->GetDescriptor(); |
| 577 | if (descriptor == NULL) { |
| 578 | break; |
| 579 | } |
| 580 | if (descriptor[0] == 'L' || descriptor[0] == '[') { |
| 581 | // Found a non-primitive type. |
| 582 | if (!HasSameDescriptorClasses(descriptor, klass1, klass2)) { |
| 583 | return false; |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | // Check the return type |
| 588 | const char* descriptor = raw->GetReturnTypeDescriptor(proto_id); |
| 589 | if (descriptor[0] == 'L' || descriptor[0] == '[') { |
| 590 | if (HasSameDescriptorClasses(descriptor, klass1, klass2)) { |
| 591 | return false; |
| 592 | } |
| 593 | } |
| 594 | return true; |
| 595 | } |
| 596 | |
| 597 | // Returns true if classes referenced by the descriptor are the |
| 598 | // same classes in klass1 as they are in klass2. |
| 599 | bool ClassLinker::HasSameDescriptorClasses(const char* descriptor, |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 600 | const Class* klass1, |
| 601 | const Class* klass2) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 602 | CHECK(descriptor != NULL); |
| 603 | CHECK(klass1 != NULL); |
| 604 | CHECK(klass2 != NULL); |
| 605 | #if 0 |
| 606 | Class* found1 = FindClassNoInit(descriptor, klass1->GetClassLoader()); |
| 607 | // TODO: found1 == NULL |
| 608 | Class* found2 = FindClassNoInit(descriptor, klass2->GetClassLoader()); |
| 609 | // TODO: found2 == NULL |
| 610 | // TODO: lookup found1 in initiating loader list |
| 611 | if (found1 == NULL || found2 == NULL) { |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 612 | Thread::Current()->ClearException(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 613 | if (found1 == found2) { |
| 614 | return true; |
| 615 | } else { |
| 616 | return false; |
| 617 | } |
| 618 | } |
| 619 | #endif |
| 620 | return true; |
| 621 | } |
| 622 | |
| 623 | bool ClassLinker::InitializeSuperClass(Class* klass) { |
| 624 | CHECK(klass != NULL); |
| 625 | // TODO: assert klass lock is acquired |
| 626 | if (!klass->IsInterface() && klass->HasSuperClass()) { |
| 627 | Class* super_class = klass->GetSuperClass(); |
| 628 | if (super_class->GetStatus() != Class::kStatusInitialized) { |
| 629 | CHECK(!super_class->IsInterface()); |
| 630 | klass->MonitorExit(); |
| 631 | bool super_initialized = InitializeClass(super_class); |
| 632 | klass->MonitorEnter(); |
| 633 | // TODO: check for a pending exception |
| 634 | if (!super_initialized) { |
| 635 | klass->SetStatus(Class::kStatusError); |
| 636 | klass->NotifyAll(); |
| 637 | return false; |
| 638 | } |
| 639 | } |
| 640 | } |
| 641 | return true; |
| 642 | } |
| 643 | |
| 644 | void ClassLinker::InitializeStaticFields(Class* klass) { |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 645 | size_t num_static_fields = klass->NumStaticFields(); |
| 646 | if (num_static_fields == 0) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 647 | return; |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 648 | } |
| 649 | DexFile* dex_file = klass->GetDexFile(); |
| 650 | if (dex_file == NULL) { |
| 651 | return; |
| 652 | } |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 653 | const StringPiece& descriptor = klass->GetDescriptor(); |
Brian Carlstrom | 934486c | 2011-07-12 23:42:50 -0700 | [diff] [blame] | 654 | const RawDexFile* raw = dex_file->GetRaw(); |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 655 | const RawDexFile::ClassDef* class_def = raw->FindClassDef(descriptor); |
| 656 | CHECK(class_def != NULL); |
| 657 | const byte* addr = raw->GetEncodedArray(*class_def); |
| 658 | size_t array_size = DecodeUnsignedLeb128(&addr); |
| 659 | for (size_t i = 0; i < array_size; ++i) { |
| 660 | StaticField* field = klass->GetStaticField(i); |
| 661 | JValue value; |
| 662 | RawDexFile::ValueType type = raw->ReadEncodedValue(&addr, &value); |
| 663 | switch (type) { |
| 664 | case RawDexFile::kByte: |
| 665 | field->SetByte(value.b); |
| 666 | break; |
| 667 | case RawDexFile::kShort: |
| 668 | field->SetShort(value.s); |
| 669 | break; |
| 670 | case RawDexFile::kChar: |
| 671 | field->SetChar(value.c); |
| 672 | break; |
| 673 | case RawDexFile::kInt: |
| 674 | field->SetInt(value.i); |
| 675 | break; |
| 676 | case RawDexFile::kLong: |
| 677 | field->SetLong(value.j); |
| 678 | break; |
| 679 | case RawDexFile::kFloat: |
| 680 | field->SetFloat(value.f); |
| 681 | break; |
| 682 | case RawDexFile::kDouble: |
| 683 | field->SetDouble(value.d); |
| 684 | break; |
| 685 | case RawDexFile::kString: { |
| 686 | uint32_t string_idx = value.i; |
| 687 | String* resolved = ResolveString(klass, string_idx); |
| 688 | field->SetObject(resolved); |
| 689 | break; |
| 690 | } |
| 691 | case RawDexFile::kBoolean: |
| 692 | field->SetBoolean(value.z); |
| 693 | break; |
| 694 | case RawDexFile::kNull: |
| 695 | field->SetObject(value.l); |
| 696 | break; |
| 697 | default: |
Carl Shapiro | 606258b | 2011-07-09 16:09:09 -0700 | [diff] [blame] | 698 | LOG(FATAL) << "Unknown type " << static_cast<int>(type); |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 699 | } |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 700 | } |
| 701 | } |
| 702 | |
| 703 | bool ClassLinker::LinkClass(Class* klass) { |
| 704 | CHECK(klass->status_ == Class::kStatusIdx || |
| 705 | klass->status_ == Class::kStatusLoaded); |
| 706 | if (klass->status_ == Class::kStatusIdx) { |
| 707 | if (!LinkInterfaces(klass)) { |
| 708 | return false; |
| 709 | } |
| 710 | } |
| 711 | if (!LinkSuperClass(klass)) { |
| 712 | return false; |
| 713 | } |
| 714 | if (!LinkMethods(klass)) { |
| 715 | return false; |
| 716 | } |
| 717 | if (!LinkInstanceFields(klass)) { |
| 718 | return false; |
| 719 | } |
| 720 | CreateReferenceOffsets(klass); |
| 721 | CHECK_EQ(klass->status_, Class::kStatusLoaded); |
| 722 | klass->status_ = Class::kStatusResolved; |
| 723 | return true; |
| 724 | } |
| 725 | |
| 726 | bool ClassLinker::LinkInterfaces(Class* klass) { |
| 727 | scoped_array<uint32_t> interfaces_idx; |
| 728 | // TODO: store interfaces_idx in the Class object |
| 729 | // TODO: move this outside of link interfaces |
| 730 | if (klass->interface_count_ > 0) { |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 731 | size_t length = klass->interface_count_ * sizeof(klass->interfaces_[0]); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 732 | interfaces_idx.reset(new uint32_t[klass->interface_count_]); |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 733 | memcpy(interfaces_idx.get(), klass->interfaces_, length); |
| 734 | memset(klass->interfaces_, 0xFF, length); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 735 | } |
| 736 | // Mark the class as loaded. |
| 737 | klass->status_ = Class::kStatusLoaded; |
| 738 | if (klass->super_class_idx_ != RawDexFile::kDexNoIndex) { |
| 739 | Class* super_class = ResolveClass(klass, klass->super_class_idx_); |
| 740 | if (super_class == NULL) { |
| 741 | LG << "Failed to resolve superclass"; |
| 742 | return false; |
| 743 | } |
| 744 | klass->super_class_ = super_class; // TODO: write barrier |
| 745 | } |
| 746 | if (klass->interface_count_ > 0) { |
| 747 | for (size_t i = 0; i < klass->interface_count_; ++i) { |
| 748 | uint32_t idx = interfaces_idx[i]; |
| 749 | klass->interfaces_[i] = ResolveClass(klass, idx); |
| 750 | if (klass->interfaces_[i] == NULL) { |
| 751 | LG << "Failed to resolve interface"; |
| 752 | return false; |
| 753 | } |
| 754 | // Verify |
| 755 | if (!klass->CanAccess(klass->interfaces_[i])) { |
| 756 | LG << "Inaccessible interface"; |
| 757 | return false; |
| 758 | } |
| 759 | } |
| 760 | } |
| 761 | return true; |
| 762 | } |
| 763 | |
| 764 | bool ClassLinker::LinkSuperClass(Class* klass) { |
| 765 | CHECK(!klass->IsPrimitive()); |
| 766 | const Class* super = klass->GetSuperClass(); |
| 767 | if (klass->GetDescriptor() == "Ljava/lang/Object;") { |
| 768 | if (super != NULL) { |
| 769 | LG << "Superclass must not be defined"; // TODO: ClassFormatError |
| 770 | return false; |
| 771 | } |
| 772 | // TODO: clear finalize attribute |
| 773 | return true; |
| 774 | } |
| 775 | if (super == NULL) { |
| 776 | LG << "No superclass defined"; // TODO: LinkageError |
| 777 | return false; |
| 778 | } |
| 779 | // Verify |
| 780 | if (super->IsFinal()) { |
| 781 | LG << "Superclass is declared final"; // TODO: IncompatibleClassChangeError |
| 782 | return false; |
| 783 | } |
| 784 | if (super->IsInterface()) { |
| 785 | LG << "Superclass is an interface"; // TODO: IncompatibleClassChangeError |
| 786 | return false; |
| 787 | } |
| 788 | if (!klass->CanAccess(super)) { |
| 789 | LG << "Superclass is inaccessible"; // TODO: IllegalAccessError |
| 790 | return false; |
| 791 | } |
| 792 | return true; |
| 793 | } |
| 794 | |
| 795 | // Populate the class vtable and itable. |
| 796 | bool ClassLinker::LinkMethods(Class* klass) { |
| 797 | if (klass->IsInterface()) { |
| 798 | // No vtable. |
| 799 | size_t count = klass->NumVirtualMethods(); |
| 800 | if (!IsUint(16, count)) { |
| 801 | LG << "Too many methods on interface"; // TODO: VirtualMachineError |
| 802 | return false; |
| 803 | } |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 804 | for (size_t i = 0; i < count; ++i) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 805 | klass->GetVirtualMethod(i)->method_index_ = i; |
| 806 | } |
| 807 | } else { |
| 808 | // Link virtual method tables |
| 809 | LinkVirtualMethods(klass); |
| 810 | |
| 811 | // Link interface method tables |
| 812 | LinkInterfaceMethods(klass); |
| 813 | |
| 814 | // Insert stubs. |
| 815 | LinkAbstractMethods(klass); |
| 816 | } |
| 817 | return true; |
| 818 | } |
| 819 | |
| 820 | bool ClassLinker::LinkVirtualMethods(Class* klass) { |
| 821 | uint32_t max_count = klass->NumVirtualMethods(); |
| 822 | if (klass->GetSuperClass() != NULL) { |
| 823 | max_count += klass->GetSuperClass()->NumVirtualMethods(); |
| 824 | } else { |
| 825 | CHECK(klass->GetDescriptor() == "Ljava/lang/Object;"); |
| 826 | } |
| 827 | // TODO: do not assign to the vtable field until it is fully constructed. |
| 828 | // TODO: make this a vector<Method*> instead? |
| 829 | klass->vtable_ = new Method*[max_count]; |
| 830 | if (klass->HasSuperClass()) { |
| 831 | memcpy(klass->vtable_, |
| 832 | klass->GetSuperClass()->vtable_, |
| 833 | klass->GetSuperClass()->vtable_count_ * sizeof(Method*)); |
| 834 | size_t actual_count = klass->GetSuperClass()->vtable_count_; |
| 835 | // See if any of our virtual methods override the superclass. |
| 836 | for (size_t i = 0; i < klass->NumVirtualMethods(); ++i) { |
| 837 | Method* local_method = klass->GetVirtualMethod(i); |
| 838 | size_t j = 0; |
| 839 | for (; j < klass->GetSuperClass()->vtable_count_; ++j) { |
| 840 | const Method* super_method = klass->vtable_[j]; |
| 841 | if (local_method->HasSameNameAndPrototype(super_method)) { |
| 842 | // Verify |
| 843 | if (super_method->IsFinal()) { |
| 844 | LG << "Method overrides final method"; // TODO: VirtualMachineError |
| 845 | return false; |
| 846 | } |
| 847 | klass->vtable_[j] = local_method; |
| 848 | local_method->method_index_ = j; |
| 849 | break; |
| 850 | } |
| 851 | } |
| 852 | if (j == klass->GetSuperClass()->vtable_count_) { |
| 853 | // Not overriding, append. |
| 854 | klass->vtable_[actual_count] = local_method; |
| 855 | local_method->method_index_ = actual_count; |
| 856 | actual_count += 1; |
| 857 | } |
| 858 | } |
| 859 | if (!IsUint(16, actual_count)) { |
| 860 | LG << "Too many methods defined on class"; // TODO: VirtualMachineError |
| 861 | return false; |
| 862 | } |
| 863 | CHECK_LE(actual_count, max_count); |
| 864 | if (actual_count < max_count) { |
| 865 | Method** new_vtable = new Method*[actual_count]; |
| 866 | memcpy(new_vtable, klass->vtable_, actual_count * sizeof(Method*)); |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 867 | delete[] klass->vtable_; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 868 | klass->vtable_ = new_vtable; |
| 869 | LG << "shrunk vtable: " |
| 870 | << "was " << max_count << ", " |
| 871 | << "now " << actual_count; |
| 872 | } |
| 873 | klass->vtable_count_ = actual_count; |
| 874 | } else { |
| 875 | CHECK(klass->GetDescriptor() == "Ljava/lang/Object;"); |
| 876 | if (!IsUint(16, klass->NumVirtualMethods())) { |
| 877 | LG << "Too many methods"; // TODO: VirtualMachineError |
| 878 | return false; |
| 879 | } |
| 880 | for (size_t i = 0; i < klass->NumVirtualMethods(); ++i) { |
| 881 | klass->vtable_[i] = klass->GetVirtualMethod(i); |
| 882 | klass->GetVirtualMethod(i)->method_index_ = i & 0xFFFF; |
| 883 | } |
| 884 | klass->vtable_count_ = klass->NumVirtualMethods(); |
| 885 | } |
| 886 | return true; |
| 887 | } |
| 888 | |
| 889 | bool ClassLinker::LinkInterfaceMethods(Class* klass) { |
| 890 | int pool_offset = 0; |
| 891 | int pool_size = 0; |
| 892 | int miranda_count = 0; |
| 893 | int miranda_alloc = 0; |
| 894 | size_t super_ifcount; |
| 895 | if (klass->HasSuperClass()) { |
| 896 | super_ifcount = klass->GetSuperClass()->iftable_count_; |
| 897 | } else { |
| 898 | super_ifcount = 0; |
| 899 | } |
| 900 | size_t ifCount = super_ifcount; |
| 901 | ifCount += klass->interface_count_; |
| 902 | for (size_t i = 0; i < klass->interface_count_; i++) { |
| 903 | ifCount += klass->interfaces_[i]->iftable_count_; |
| 904 | } |
| 905 | if (ifCount == 0) { |
| 906 | assert(klass->iftable_count_ == 0); |
| 907 | assert(klass->iftable == NULL); |
| 908 | return true; |
| 909 | } |
| 910 | klass->iftable_ = new InterfaceEntry[ifCount * sizeof(InterfaceEntry)]; |
| 911 | memset(klass->iftable_, 0x00, sizeof(InterfaceEntry) * ifCount); |
| 912 | if (super_ifcount != 0) { |
| 913 | memcpy(klass->iftable_, klass->GetSuperClass()->iftable_, |
| 914 | sizeof(InterfaceEntry) * super_ifcount); |
| 915 | } |
| 916 | // Flatten the interface inheritance hierarchy. |
| 917 | size_t idx = super_ifcount; |
| 918 | for (size_t i = 0; i < klass->interface_count_; i++) { |
| 919 | Class* interf = klass->interfaces_[i]; |
| 920 | assert(interf != NULL); |
| 921 | if (!interf->IsInterface()) { |
| 922 | LG << "Class implements non-interface class"; // TODO: IncompatibleClassChangeError |
| 923 | return false; |
| 924 | } |
| 925 | klass->iftable_[idx++].SetClass(interf); |
| 926 | for (size_t j = 0; j < interf->iftable_count_; j++) { |
| 927 | klass->iftable_[idx++].SetClass(interf->iftable_[j].GetClass()); |
| 928 | } |
| 929 | } |
| 930 | CHECK_EQ(idx, ifCount); |
| 931 | klass->iftable_count_ = ifCount; |
| 932 | if (klass->IsInterface() || super_ifcount == ifCount) { |
| 933 | return true; |
| 934 | } |
| 935 | for (size_t i = super_ifcount; i < ifCount; i++) { |
| 936 | pool_size += klass->iftable_[i].GetClass()->NumVirtualMethods(); |
| 937 | } |
| 938 | if (pool_size == 0) { |
| 939 | return true; |
| 940 | } |
| 941 | klass->ifvi_pool_count_ = pool_size; |
| 942 | klass->ifvi_pool_ = new uint32_t[pool_size]; |
| 943 | std::vector<Method*> miranda_list; |
| 944 | for (size_t i = super_ifcount; i < ifCount; ++i) { |
| 945 | klass->iftable_[i].method_index_array_ = klass->ifvi_pool_ + pool_offset; |
| 946 | Class* interface = klass->iftable_[i].GetClass(); |
| 947 | pool_offset += interface->NumVirtualMethods(); // end here |
| 948 | for (size_t j = 0; j < interface->NumVirtualMethods(); ++j) { |
| 949 | Method* interface_method = interface->GetVirtualMethod(j); |
| 950 | int k; // must be signed |
| 951 | for (k = klass->vtable_count_ - 1; k >= 0; --k) { |
| 952 | if (interface_method->HasSameNameAndPrototype(klass->vtable_[k])) { |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 953 | if (!klass->vtable_[k]->IsPublic()) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 954 | LG << "Implementation not public"; |
| 955 | return false; |
| 956 | } |
| 957 | klass->iftable_[i].method_index_array_[j] = k; |
| 958 | break; |
| 959 | } |
| 960 | } |
| 961 | if (k < 0) { |
| 962 | if (miranda_count == miranda_alloc) { |
| 963 | miranda_alloc += 8; |
| 964 | if (miranda_list.empty()) { |
| 965 | miranda_list.resize(miranda_alloc); |
| 966 | } else { |
| 967 | miranda_list.resize(miranda_alloc); |
| 968 | } |
| 969 | } |
| 970 | int mir; |
| 971 | for (mir = 0; mir < miranda_count; mir++) { |
| 972 | if (miranda_list[mir]->HasSameNameAndPrototype(interface_method)) { |
| 973 | break; |
| 974 | } |
| 975 | } |
| 976 | // point the interface table at a phantom slot index |
| 977 | klass->iftable_[i].method_index_array_[j] = klass->vtable_count_ + mir; |
| 978 | if (mir == miranda_count) { |
| 979 | miranda_list[miranda_count++] = interface_method; |
| 980 | } |
| 981 | } |
| 982 | } |
| 983 | } |
| 984 | if (miranda_count != 0) { |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 985 | int oldMethodCount = klass->NumVirtualMethods(); |
| 986 | int newMethodCount = oldMethodCount + miranda_count; |
| 987 | Method** newVirtualMethods = new Method*[newMethodCount]; |
| 988 | if (klass->virtual_methods_ != NULL) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 989 | memcpy(newVirtualMethods, |
| 990 | klass->virtual_methods_, |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 991 | klass->NumVirtualMethods() * sizeof(Method*)); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 992 | } |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 993 | klass->virtual_methods_ = newVirtualMethods; |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 994 | klass->num_virtual_methods_ = newMethodCount; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 995 | |
| 996 | CHECK(klass->vtable_ != NULL); |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 997 | int oldVtableCount = klass->vtable_count_; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 998 | klass->vtable_count_ += miranda_count; |
| 999 | |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 1000 | for (int i = 0; i < miranda_count; i++) { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1001 | Method* meth = AllocMethod(); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1002 | memcpy(meth, miranda_list[i], sizeof(Method)); |
| 1003 | meth->klass_ = klass; |
| 1004 | meth->access_flags_ |= kAccMiranda; |
| 1005 | meth->method_index_ = 0xFFFF & (oldVtableCount + i); |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 1006 | klass->virtual_methods_[oldMethodCount+i] = meth; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1007 | klass->vtable_[oldVtableCount + i] = meth; |
| 1008 | } |
| 1009 | } |
| 1010 | return true; |
| 1011 | } |
| 1012 | |
| 1013 | void ClassLinker::LinkAbstractMethods(Class* klass) { |
| 1014 | for (size_t i = 0; i < klass->NumVirtualMethods(); ++i) { |
| 1015 | Method* method = klass->GetVirtualMethod(i); |
| 1016 | if (method->IsAbstract()) { |
| 1017 | method->insns_ = reinterpret_cast<uint16_t*>(0xFFFFFFFF); // TODO: AbstractMethodError |
| 1018 | } |
| 1019 | } |
| 1020 | } |
| 1021 | |
| 1022 | bool ClassLinker::LinkInstanceFields(Class* klass) { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1023 | int field_offset; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1024 | if (klass->GetSuperClass() != NULL) { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1025 | field_offset = klass->GetSuperClass()->object_size_; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1026 | } else { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1027 | field_offset = OFFSETOF_MEMBER(DataObject, fields_); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1028 | } |
| 1029 | // Move references to the front. |
| 1030 | klass->num_reference_ifields_ = 0; |
| 1031 | size_t i = 0; |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 1032 | for ( ; i < klass->NumInstanceFields(); i++) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1033 | InstanceField* pField = klass->GetInstanceField(i); |
| 1034 | char c = pField->GetType(); |
| 1035 | |
| 1036 | if (c != '[' && c != 'L') { |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 1037 | for (size_t j = klass->NumInstanceFields() - 1; j > i; j--) { |
| 1038 | InstanceField* refField = klass->GetInstanceField(j); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1039 | char rc = refField->GetType(); |
| 1040 | if (rc == '[' || rc == 'L') { |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 1041 | klass->SetInstanceField(i, refField); |
| 1042 | klass->SetInstanceField(j, pField); |
| 1043 | pField = refField; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1044 | c = rc; |
| 1045 | klass->num_reference_ifields_++; |
| 1046 | break; |
| 1047 | } |
| 1048 | } |
| 1049 | } else { |
| 1050 | klass->num_reference_ifields_++; |
| 1051 | } |
| 1052 | if (c != '[' && c != 'L') { |
| 1053 | break; |
| 1054 | } |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1055 | pField->SetOffset(field_offset); |
| 1056 | field_offset += sizeof(uint32_t); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1057 | } |
| 1058 | |
| 1059 | // Now we want to pack all of the double-wide fields together. If |
| 1060 | // we're not aligned, though, we want to shuffle one 32-bit field |
| 1061 | // into place. If we can't find one, we'll have to pad it. |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1062 | if (i != klass->NumInstanceFields() && (field_offset & 0x04) != 0) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1063 | InstanceField* pField = klass->GetInstanceField(i); |
| 1064 | char c = pField->GetType(); |
| 1065 | |
| 1066 | if (c != 'J' && c != 'D') { |
| 1067 | // The field that comes next is 32-bit, so just advance past it. |
| 1068 | assert(c != '[' && c != 'L'); |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1069 | pField->SetOffset(field_offset); |
| 1070 | field_offset += sizeof(uint32_t); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1071 | i++; |
| 1072 | } else { |
| 1073 | // Next field is 64-bit, so search for a 32-bit field we can |
| 1074 | // swap into it. |
| 1075 | bool found = false; |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 1076 | for (size_t j = klass->NumInstanceFields() - 1; j > i; j--) { |
| 1077 | InstanceField* singleField = klass->GetInstanceField(j); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1078 | char rc = singleField->GetType(); |
| 1079 | if (rc != 'J' && rc != 'D') { |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 1080 | klass->SetInstanceField(i, singleField); |
| 1081 | klass->SetInstanceField(j, pField); |
| 1082 | pField = singleField; |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1083 | pField->SetOffset(field_offset); |
| 1084 | field_offset += sizeof(uint32_t); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1085 | found = true; |
| 1086 | i++; |
| 1087 | break; |
| 1088 | } |
| 1089 | } |
| 1090 | if (!found) { |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1091 | field_offset += sizeof(uint32_t); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1092 | } |
| 1093 | } |
| 1094 | } |
| 1095 | |
| 1096 | // Alignment is good, shuffle any double-wide fields forward, and |
| 1097 | // finish assigning field offsets to all fields. |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1098 | assert(i == klass->NumInstanceFields() || (field_offset & 0x04) == 0); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1099 | for ( ; i < klass->NumInstanceFields(); i++) { |
| 1100 | InstanceField* pField = klass->GetInstanceField(i); |
| 1101 | char c = pField->GetType(); |
| 1102 | if (c != 'D' && c != 'J') { |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 1103 | for (size_t j = klass->NumInstanceFields() - 1; j > i; j--) { |
| 1104 | InstanceField* doubleField = klass->GetInstanceField(j); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1105 | char rc = doubleField->GetType(); |
| 1106 | if (rc == 'D' || rc == 'J') { |
Brian Carlstrom | a7f4f48 | 2011-07-17 17:01:34 -0700 | [diff] [blame] | 1107 | klass->SetInstanceField(i, doubleField); |
| 1108 | klass->SetInstanceField(j, pField); |
| 1109 | pField = doubleField; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1110 | c = rc; |
| 1111 | break; |
| 1112 | } |
| 1113 | } |
| 1114 | } else { |
| 1115 | // This is a double-wide field, leave it be. |
| 1116 | } |
| 1117 | |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1118 | pField->SetOffset(field_offset); |
| 1119 | field_offset += sizeof(uint32_t); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1120 | if (c == 'J' || c == 'D') |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1121 | field_offset += sizeof(uint32_t); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1122 | } |
| 1123 | |
| 1124 | #ifndef NDEBUG |
| 1125 | /* Make sure that all reference fields appear before |
| 1126 | * non-reference fields, and all double-wide fields are aligned. |
| 1127 | */ |
| 1128 | j = 0; // seen non-ref |
| 1129 | for (i = 0; i < klass->NumInstanceFields(); i++) { |
| 1130 | InstanceField *pField = &klass->ifields[i]; |
| 1131 | char c = pField->GetType(); |
| 1132 | |
| 1133 | if (c == 'D' || c == 'J') { |
| 1134 | assert((pField->offset_ & 0x07) == 0); |
| 1135 | } |
| 1136 | |
| 1137 | if (c != '[' && c != 'L') { |
| 1138 | if (!j) { |
| 1139 | assert(i == klass->num_reference_ifields_); |
| 1140 | j = 1; |
| 1141 | } |
| 1142 | } else if (j) { |
| 1143 | assert(false); |
| 1144 | } |
| 1145 | } |
| 1146 | if (!j) { |
| 1147 | assert(klass->num_reference_ifields_ == klass->NumInstanceFields()); |
| 1148 | } |
| 1149 | #endif |
| 1150 | |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1151 | klass->object_size_ = field_offset; |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1152 | return true; |
| 1153 | } |
| 1154 | |
| 1155 | // Set the bitmap of reference offsets, refOffsets, from the ifields |
| 1156 | // list. |
| 1157 | void ClassLinker::CreateReferenceOffsets(Class* klass) { |
| 1158 | uint32_t reference_offsets = 0; |
| 1159 | if (klass->HasSuperClass()) { |
| 1160 | reference_offsets = klass->GetSuperClass()->GetReferenceOffsets(); |
| 1161 | } |
| 1162 | // If our superclass overflowed, we don't stand a chance. |
| 1163 | if (reference_offsets != CLASS_WALK_SUPER) { |
| 1164 | // All of the fields that contain object references are guaranteed |
| 1165 | // to be at the beginning of the ifields list. |
| 1166 | for (size_t i = 0; i < klass->NumReferenceInstanceFields(); ++i) { |
| 1167 | // Note that, per the comment on struct InstField, f->byteOffset |
| 1168 | // is the offset from the beginning of obj, not the offset into |
| 1169 | // obj->instanceData. |
| 1170 | const InstanceField* field = klass->GetInstanceField(i); |
| 1171 | size_t byte_offset = field->GetOffset(); |
| 1172 | CHECK_GE(byte_offset, CLASS_SMALLEST_OFFSET); |
Elliott Hughes | 1f359b0 | 2011-07-17 14:27:17 -0700 | [diff] [blame] | 1173 | CHECK_EQ(byte_offset & (CLASS_OFFSET_ALIGNMENT - 1), 0U); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1174 | if (CLASS_CAN_ENCODE_OFFSET(byte_offset)) { |
| 1175 | uint32_t new_bit = CLASS_BIT_FROM_OFFSET(byte_offset); |
Elliott Hughes | 1f359b0 | 2011-07-17 14:27:17 -0700 | [diff] [blame] | 1176 | CHECK_NE(new_bit, 0U); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1177 | reference_offsets |= new_bit; |
| 1178 | } else { |
| 1179 | reference_offsets = CLASS_WALK_SUPER; |
| 1180 | break; |
| 1181 | } |
| 1182 | } |
| 1183 | klass->SetReferenceOffsets(reference_offsets); |
| 1184 | } |
| 1185 | } |
| 1186 | |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 1187 | Class* ClassLinker::ResolveClass(const Class* referrer, uint32_t class_idx) { |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1188 | DexFile* dex_file = referrer->GetDexFile(); |
| 1189 | Class* resolved = dex_file->GetResolvedClass(class_idx); |
| 1190 | if (resolved != NULL) { |
| 1191 | return resolved; |
| 1192 | } |
| 1193 | const char* descriptor = dex_file->GetRaw()->dexStringByTypeIdx(class_idx); |
| 1194 | if (descriptor[0] != '\0' && descriptor[1] == '\0') { |
Carl Shapiro | 565f507 | 2011-07-10 13:39:43 -0700 | [diff] [blame] | 1195 | JType type = static_cast<JType>(descriptor[0]); |
| 1196 | resolved = FindPrimitiveClass(type); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1197 | } else { |
Brian Carlstrom | 6cc1845 | 2011-07-18 15:10:33 -0700 | [diff] [blame^] | 1198 | resolved = FindClass(descriptor, referrer->GetClassLoader()); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1199 | } |
| 1200 | if (resolved != NULL) { |
| 1201 | Class* check = resolved->IsArray() ? resolved->component_type_ : resolved; |
| 1202 | if (referrer->GetDexFile() != check->GetDexFile()) { |
| 1203 | if (check->GetClassLoader() != NULL) { |
| 1204 | LG << "Class resolved by unexpected DEX"; // TODO: IllegalAccessError |
| 1205 | return NULL; |
| 1206 | } |
| 1207 | } |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 1208 | dex_file->SetResolvedClass(resolved, class_idx); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1209 | } else { |
Carl Shapiro | b557353 | 2011-07-12 18:22:59 -0700 | [diff] [blame] | 1210 | CHECK(Thread::Current()->IsExceptionPending()); |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1211 | } |
| 1212 | return resolved; |
| 1213 | } |
| 1214 | |
| 1215 | Method* ResolveMethod(const Class* referrer, uint32_t method_idx, |
| 1216 | /*MethodType*/ int method_type) { |
| 1217 | CHECK(false); |
| 1218 | return NULL; |
| 1219 | } |
| 1220 | |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 1221 | String* ClassLinker::ResolveString(const Class* referring, uint32_t string_idx) { |
| 1222 | const RawDexFile* raw = referring->GetDexFile()->GetRaw(); |
| 1223 | const RawDexFile::StringId& string_id = raw->GetStringId(string_idx); |
| 1224 | const char* string_data = raw->GetStringData(string_id); |
Brian Carlstrom | a080803 | 2011-07-18 00:39:23 -0700 | [diff] [blame] | 1225 | String* new_string = Heap::AllocStringFromModifiedUtf8(java_lang_String_, char_array_class_, string_data); |
Carl Shapiro | 5fafe2b | 2011-07-09 15:34:41 -0700 | [diff] [blame] | 1226 | // TODO: intern the new string |
| 1227 | referring->GetDexFile()->SetResolvedString(new_string, string_idx); |
| 1228 | return new_string; |
| 1229 | } |
| 1230 | |
Carl Shapiro | 0e5d75d | 2011-07-06 18:28:37 -0700 | [diff] [blame] | 1231 | } // namespace art |